Chevrolet R-4 to Sanden Compressor Adapter Bracket. Designed to adapt a Sanden compressor into a stock R-4 bracket Fits Chevrolet S-10 and GMC S-15 4.3L V6; Chevrolet and GMC Pickups and Suburban, Chevrolet Blazer 5.0L & 5.7L V8 Engines. Works with power steering, air pump and fuel ...